<template lang="html">
    <div class="sub">
        <div class="inleft div" @click="substrict">-</div>
        <div class="incenter div" v-text="count"></div>
        <div class="inright div" @click="add">+</div>
    </div>
</template>

<script>
export default {
    data(){
        return {
            count : 1
        }
    },
    methods : {
        substrict(){
            this.count --;
            if (this.count < 1) {
                this.count = 1;
            }
            this.sendmessage();
        },
        add(){
            this.count ++;
            this.sendmessage();
        },
        sendmessage(){
            this.$emit('dataobj',this.count);
        }
    }
}
</script>

<style lang="css" scoped>
    .sub .div{
        width: 40px;
        height: 25px;
        line-height: 25px;
        border: 1px solid #000;
        display: inline-block;
        text-align: center;
    }
</style>
